Caravaggi MTC User guide

USE AND MAINTENANCE INSTRUCTION MANUAL
Stump Grinder
MTC
READ THE INSTRUCTION MANUAL BEFORE USING THE
MACHINE.
TRANSLATION OF THE ORIGINAL INSTRUCTIONS
EN
Caravaggi Srl - Via Monte Adamello, 20 - 25037 Pontoglio (BS) – ITALY

Use & Maintenance Instructions Stump Grinder MTC Series 
The company:
CARAVAGGI Srl
REGISTERED OFFICE, FACTORY AND ADMINISTRATION:
Via Monte Adamello, 20 – 25037 Pontoglio (BS) - ITALY
declares under its own responsibility that the
Stump grinder
Model: stump grinder for two wheels tractors
Serial no. see machine rating plate
Year built: see rating plate
c o m p l i e s w i t h a l l t h e p r o v i s i o n s o f t h e f o l l o w i n g E u r o p e a n
Directives:Machinery Directive 2006/42/CE amending Directive 95/16/CE and
since the machine has been adapted to the following harmonized standards and
specifications, where applicable:
UNI EN ISO 12100 "Safety of machinery – Basic concepts, general principles of
design – Basic terminology, methodology, technical principles".
UNI EN ISO 4254-1: Agricultural machinery - Safety - Part 1: General requirements.
UNI EN 13683: Safety – Powered shredders/chippers.
ISO 11684: Tractors, machinery for agriculture and forestry, powered lawn and
garden equipment – Safety signs and hazard pictorials – General principles.
The Legal Representative
(Valerio Gianpaolo Caravaggi)
Pontoglio, 01 / 01 / 2018
Person authorized to draw up the declaration of conformity: Valerio
Gianpaolo Caravaggi
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EC DECLARATION OF CONFORMITY
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Use & Maintenance Instructions Stump Grinder MTC Series 
1. HAZARD PICTORIALS
Warning!
Wear a hard hat, hearing protectors and safety
goggles.
Warning!
Wear protective gloves.
Warning!
Wear safety shoes.
Warning!
Wear clothes that are suitable for work on
machines with moving parts.
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Use & Maintenance Instructions Stump Grinder MTC Series 
Warning!
Switch off the engine before carrying out any
maintenance.
Hazard!
Projection of splinters. Keep to a safety distance
from loading and unloading equipment.
Hazard!
Keep fingers well away from cutting elements.
Hazard!
Make sure the blades have stopped completely
before approaching.
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Use & Maintenance Instructions Stump Grinder MTC Series 
Warning!
Only one person must operate the machine.
Warning!
Do not use petrol engines in closed environments.
Risk of intoxication.
Warning!
Machine lifting point.
Hazard!
Keep well away from moving parts.
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Use & Maintenance Instructions Stump Grinder MTC Series 
2. ABOUT THIS INSTRUCTION MANUAL
This instruction manual has been written for the user of the machine, the
owner, the maintenance operator and the repair technician and must
always be available for consultation.
It explains the purposes for which the machine was designed and the
machine’s technical characteristics. It also contains instructions for
transport, cleaning, adjustments, use, maintenance and ordering spare
parts. It also contains information for the operator, details of residual risks,
and warnings with regard to operations that must be carried out with
particular care.
The machine is intended for professional use and the instruction manual
can never replace the experience acquired by the user.
This manual is to be considered an integral part of the machine and must
be kept for future reference until it is dismantled at the end of its useful life.
The instruction manual must always be available for consultation and must
be kept in a dry, protected place.
If the handbook gets lost or damaged, a replacement copy can be obtained
from the manufacturer, quoting the serial number, type and year of
construction shown on the plate fixed to the stump grinder (section 5).
The manufacturer reserves the right to update its products and the
instruction manual without the obligation to update earlier versions.
The manufacturer disclaims all liability in the following cases:
•improper use of the stump grinder
•uses not in accordance with the instructions contained herein
•serious deficiencies in prescribed and recommended maintenance
•unauthorized modifications or interference
•use of spare parts that are not original or model-specific
•total or partial failure to follow the instructions
•force majeure.
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Use & Maintenance Instructions Stump Grinder MTC Series 
3. IDENTIFICATION OF THE MAIN PARTS
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1. Jockey wheel
2. Grinding disc
3. Transmission unit
4. Rubber guards
5. PTO
6. Jockey wheel towing bracket
Fig. 1
Fig. 2
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1
6
2
4
3
5

Use & Maintenance Instructions Stump Grinder MTC Series 
4. CORRECT USE OF THE MACHINE
This machine must be run by an operator only.
In order to use the machine correctly, the operator must first read and
understand the instructions in this handbook. Stop the machine
immediately if anyone enters the danger area.
The Caravaggi stump grinder series MTC is designed and built to shred
stumps and roots of felled trees in gardens, parks, channel banks and other
places, helping to restore the landscape.
It is not suitable for uses other than those listed above.
The operator must be thoroughly acquainted with all the instructions
provided in this instruction manual.
5. UNPACKING AND PREPARATION
The stump grinder series MTC can be arranged on pallets to facilitate
handling and transport before installation.
To transport the machine in these conditions it is indispensable to use a
transpallet or the like with an overall load capacity of around 100 kilos.
Do not:
•lift the stump grinder using ropes or other unsuitable means;
•drag the stump grinder
•subject the machine knocks or impact;
•expose the machine to rain, frost or other bad weather conditions.
On taking delivery, check that the contents correspond to the delivery note.
If you find any damage or deformity due to transport, report this to the
carrier immediately and inform the authorized dealer or the manufacturer.
In particular, check the machine for:
•dents, bumps or deformation;
•damp areas or signs indicating that the pack has been exposed to foul
weather;
•signs of tampering.
After checking that the transport has been carried out correctly, prepare the
machine as follows:
•cut the packaging strips and free the machine from the pallet;
•remove the cardboard and move the stump grinder from the pallet, using
hoists and taking care not to damage the grinding unit;
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Use & Maintenance Instructions Stump Grinder MTC Series 
•fit the front rubber guard in position and connect the lower bracket
assembly with the upper one on the sleeve, by screwing the retaining
screws (Fig. 3).
•insert the towing bracket and the jockey wheel in their seats and tighten
the wing nut and the retaining screws (Figs. 4 and 5);
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Fig. 3
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Fig. 4
Fig. 5
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Use & Maintenance Instructions Stump Grinder MTC Series 
6. TECHNICAL CHARACTERISTICS
The EC identification plate is clearly visible on the stump grinder (Fig. 6).
In all communications with the manufacturer, state the serial number on the
identification plate.
6.1 Overall dimensions
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Fig. 6
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Length (mm): 880
Width (mm): 730
Height (mm): 550
Empty weight (Kg): ~100
LWA MAX (dB): 104
Fig. 7
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Use & Maintenance Instructions Stump Grinder MTC Series 
7. SAFETY RULES
This handbook contains rules on how to use the machine properly and
details of the hazards that may be encountered. Besides following the
rules, the operator should use the machine sensibly, based on his
experience, and adopt all the necessary precautions to prevent accident or
injury.
The manufacturer cannot be held liable for any alterations to the machine
that are not authorized in advance in writing.
La stump grinder for walking tractors can be used solely for shredding the
stumps and roots of felled trees.
It must never be used for any other purposes, such as shredding rocks or
other materials.
The machine must only be operated by a fully qualified person who is
authorized to do so and is thoroughly acquainted with the operating
principles and the inherent hazards. Read through the handbook before
setting to work. The stump grinder must not be operated by children.
7.1 GENERAL SAFETY AND ACCIDENT-PREVENTION
RULES
•Basic rule: check the machine carefully each time before starting up.
•Besides following the recommendations contained in this handbook, it is
important to follow the general safety and accident-prevention rules.
Before using the machine, the operator must be fully acquainted with its
features, devices, controls and functions.
•Before setting to work, make sure the grinding tools are properly secured.
If they look damaged, they need to be replaced. Mount the tools as
instructed and only use original spares supplied by the manufacturer (or
an authorized dealer).
•Before and after each work session, check that the guards, covers and
safety devices are correctly installed and integral, and are properly
secured with nuts and bolts.
•The notices on the machine provide a series of important instructions.
They are there to enable you to work in complete safety. Read all the
safety stickers on the machine and follow the instructions on them. If they
become damaged or unreadable, they need to be cleaned or replaced in
the exact position, as described in the relevant section.
•The machine must only be used in an open space, on flat, firm ground
that is free from obstacles. Make sure the machine is positioned stably
before operating.
•Do not use the stump grinder in the rain.
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Use & Maintenance Instructions Stump Grinder MTC Series 
•Anyone approaching the machine enters the danger area and hence
becomes an EXPOSED PERSON. It is up to the operator to prevent other
people from entering the danger area and he himself must act with
extreme caution. Stop the machine immediately if anyone enters the
danger area.
•Caution: the disc continues to turn for several seconds after the engine
has been switched off.
•Keep this handbook readily available so that you can consult it for details
of the operating cycle and maintenance instructions. If it gets lost or
damaged, a replacement copy can be obtained from Caravaggi.
•The machine is designed for use by one operator only, who must always
stand in front of the walking tractor.
•Do not wear items of clothing that are likely to get caught up in the
mechanism, such as long wide sleeves, belts, and necklaces.
•Hearing protectors and safety goggles must always be worn when
operating the machine.
•Do not leave the stump grinder unattended when it is connected to the
walking tractor running.
•Do not place any tools or other objects on the machine as they could
damage it or injure the operator.
•Use only original spares provided by Caravaggi.
Safety rules during operation
•Before starting operating the machine, check that the area is clear of any
foreign materials.
•Keep the face and hands well away from the grinding disc.
•Stand firmly on the ground while operating the machine. Never stand in a
position exposed to flying splinters of material.
•Switch off the machine if there is a malfunction, abnormal vibration or any
strange noises. Disconnect the machine from the walking tractor PTO and
determine the cause of the problem.
•Never attempt to move the machine while it is running.
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Use & Maintenance Instructions Stump Grinder MTC Series 
7.2 SPECIFIC SAFETY AND ACCIDENT-PREVENTION
RULES
7.2.1 Models for use with a walking tractor
•All maintenance, adjustment and cleaning operations (e.g. to remove
foreign bodies from the hoppers) must be carried out with the machine
standing on firm ground, the walking tractor engine off, the handbrake
engaged, and the ignition switched off and the key removed.
•Never stand between the walking tractor and the machine with the power
takeoff connected and the engine on.
•Make sure the transmission unit guards are integral and in good
condition.
•Any damaged or broken guards must be replaced immediately.
•Never use the machine in enclosed or poorly ventilated areas (even if the
doors and windows are open), as the exhaust fumes are toxic.
•Before detaching the machine from the tractor, make sure they are
standing still on flat, firm ground.
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Use & Maintenance Instructions Stump Grinder MTC Series 
8. STARTING UP
8.1 Coupling to the two-wheel tractor
•Connect the stump grinder to the walking tractor PTO, making sure the
coupling is firm and aligned. (fig. 8).
•With the help of an operator placed at the controls of the two-wheel
tractor, slightly unbalance the two-wheel tractor, so that a second
operator can remove the wheel holder from the stump.
•Unscrew the clamping nut and remove the support, rotate it 180° and
insert it into its housing: re-start and tighten the wing nut making sure that
the support is firmly fixed to the snifter.
•Unscrew the retaining screw to raise the jockey wheel and allow enough
space around the grinding disc.
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Fig. 8
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Use & Maintenance Instructions Stump Grinder MTC Series 
•With the help of an operator placed at the controls of the two-wheel
tractor, slightly unbalance the two-wheel tractor, so that a second
operator can remove the wheel holder from the stump.
•Start the walking tractor taking great care in keeping the grinding disc off
the ground.
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Warning! Before starting up the engine/motor check that the
stump grinder is on a stable surface and there are no animals
or unauthorized persons in the work area.
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Fig. 9
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Use & Maintenance Instructions Stump Grinder MTC Series 
8.4 Operation
The stump grinder has been prepared correctly and is now ready to work.
Place the grinding disc directly in front of the stump.
Continue operation until the desired depth is reached (Fig. 10).
For grinding up to 25.4 cm above and below the ground level, tilt the
walking tractor so as to reach the desired depth.
When grinding large stumps, the wood chips may accumulate under the
walking tractor. Place the machine with the accumulated chips under the
grinding disc.
Position the grinding disc over the chips and operate to clear the area
where the machine operates.
When handling large stumps, prevent the walking tractor wheels from
getting into the drilled hole: fill the hole with chips or change your
working position.
Complete the grinding of the stump at ground level and continue grinding to
the desired depth.
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Fig. 10
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Use & Maintenance Instructions Stump Grinder MTC Series 
9. MAINTENANCE
9.1.1 Replacing the grinding tools
•Unscrew the retaining screws of the tool holder.
•Remove any worn grinding tools and replace them with new ones, taking
care of the correct direction (Fig. 11a).
•Adjust the position of the tools using a calibration plate (Fig. 11b).
•Tighten the retaining screw of the tool holders.
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Fig. 11a
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Caution! Before proceeding with any maintenance
operations, switch off the engine/motor and make sure the
machine cannot be started up. Safety gloves must be worn
during maintenance operations.
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IMPORTANT
To prevent the grinding disc from rotating freely, it is
advisable to insert a rod in the supplementary holes to
stop the disc and operate more safely.
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Tool holder
Retaining
screw
Supplementary hole
Tool

Use & Maintenance Instructions Stump Grinder MTC Series 
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Fig. 11b
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Calibration
plate
Fig. 11c
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Use & Maintenance Instructions Stump Grinder MTC Series 
9.2 Routine maintenance
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Beginning
of season
Before
each job
End of
season
C h e c k s c r e w s , t i g h t n e s s ,
casing, etc.
♦
♦
Check the grinding tools for
wear
♦
♦
Check protection rubbers
♦
♦
♦
Clean machine
♦
Ingrassaggio dei punti di
rotazione principali della
macchina
♦
♦
♦
Check wear on bearings and
transmission shafts
♦
♦
Check safety stickers and
pictorials
♦
♦

Use & Maintenance Instructions Stump Grinder MTC Series 
10. TROUBLESHOOTING
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Problem
Solution
The stump grinder will
not start
Check the transmission of the motion (power
take-off of the two-wheels tractor, the gearbox).
Check the state of the engine/motor of the two-
wheels tractor (consult the instruction manual
supplied).
Difficult start-up or loss
of power
Check the transmission of the motion (power
take-off of the two-wheels tractor, the gearbox).
Check the grinding tools.
Check the state of the engine/motor of the two-
wheels tractor (consult the instruction manual
supplied).
The stump grinder
l o s e s r e v s a n d
functions irregularly
Check the transmission of the motion (power
take-off of the two-wheels tractor, the gearbox).
Check the grinding tools.
Check the state of the engine/motor of the two-
wheels tractor (consult the instruction manual
supplied).
Excessive vibration
Check the grinding tools.